/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

using Nest.Utf8Json;

namespace Nest
{
	internal class FilterAggregationFormatter : IJsonFormatter<IFilterAggregation>
	{
		public void Serialize(ref JsonWriter writer, IFilterAggregation value, IJsonFormatterResolver formatterResolver)
		{
			if (value?.Filter == null || !value.Filter.IsWritable)
			{
				writer.WriteBeginObject();
				writer.WriteEndObject();
				return;
			}

			var formatter = formatterResolver.GetFormatter<QueryContainer>();
			formatter.Serialize(ref writer, value.Filter, formatterResolver);
		}

		public IFilterAggregation Deserialize(ref JsonReader reader, IJsonFormatterResolver formatterResolver)
		{
			if (reader.GetCurrentJsonToken() != JsonToken.BeginObject)
				return null;

			var formatter = formatterResolver.GetFormatter<QueryContainer>();
			var container = formatter.Deserialize(ref reader, formatterResolver);
			var agg = new FilterAggregation
			{
				Filter = container
			};

			return agg;
		}
	}
}
